Yes, there are many interesting Uta One Piece fanfictions. Some focus on exploring Uta's backstory in more depth, like her relationship with Shanks before she became a famous singer. Others might create alternate universes where Uta's powers are used in different ways to change the course of the One Piece story.
One common theme is the exploration of Uta's true nature. Since she has a complex character in the movie, fanfictions often try to dig deeper into what makes her tick. Another theme is the power of her music, like how it can be a weapon or a tool for peace in different scenarios.
One idea could be Uta using her music powers in new and unexpected ways. For example, she might create a song that can temporarily freeze time in a small area within the One Piece world, allowing her to escape from a tough situation or pull off a clever heist. Another idea is a fanfiction where Uta teams up with the Straw Hat crew for a special mission. She could use her music to communicate with sea creatures and gain their help in navigating dangerous waters.
Their relationship could start with Uta being initially distrustful of Luffy. After all, Luffy is a pirate and Uta has her own ideas about pirates. But as she sees Luffy's pure heart and his determination to protect his friends and pursue his dreams, she starts to warm up to him. They might then become friends who share their different stories and experiences.
Well, they might be really surprised by the unique and wild world of One Piece. The RWBY characters are used to their own world with Grimm and Dust, while One Piece has Devil Fruits and the Grand Line. They could be shocked by the powers of the Straw Hat Pirates like Luffy's stretching ability. Maybe they'd be inspired by the strong bonds between the One Piece characters, which could make them reflect on their own relationships in RWBY.
First, you need to have a clear idea of the plot. Decide if you want it to be an adventure, a mystery, or something else. For example, if it's an adventure, think about where Uta will go and what challenges she'll face. Then, create a basic outline of the story, like the beginning, middle, and end. Next, start with a strong opening that grabs the reader's attention, such as Uta in a dangerous situation right from the start.
The RWBY characters' opinions would vary greatly. Ruby, as the team's eager beaver, would be all in for the One Piece fanfiction. She'd be like a kid in a candy store, loving every new discovery. Weiss, being a bit of a snob sometimes, would have a more measured approach. She might nitpick about things like the logic of Devil Fruits or the pirates' lack of proper decorum. Blake would find kinship in the outcasts and rebels in One Piece, and her views would be colored by that. Yang would be the one shouting at the page during the intense fight scenes, really getting into the action. So, in summary, their reactions are as different as their personalities.